Limousine.... must be more special than the
normalimousine.... 
Of course, the necessities are essential.
1) Camera
- in the event of a possible accident (actually, your mobile with
camera can also).
2) Walky
talkie - for newbies - listen to traffic
information, pick & go locations besides taking group jobs
3) Street
Directory (in case your GPRS screw loose).. Manual
ones are still number one.
4) You ever leave your mobile at home w/o going out ?
5) Car
chargers for your walky and mobile... (this is very
important) becos, you may have disposal jobs until don't know when
- you passenger has to be in touch with you.
6) Mineral
water (ice mountain or aqua) bottles for passengers
consumption. There is a wholesaler at Tiong Bahru selling
24bottles @ $6-7 per carton.
7) Panadols. For you or your
passengers. 
8) Spare Cash
cards. You are adviced to keep another spare
cash-card in your wallet or pocket in case the other one is running
low or misplaced.
This is about all I can think of... May add up the
list.
Cheers.
